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 Republican presidential hopeful businessman Donald Trump fields questions at The Family Leadership Summit at Stephens Auditorium on July 18, 2015 in Ames, Iowa.
 Republican presidential hopeful businessman Donald Trump fields questions at The Family Leadership Summit at Stephens Auditorium on July 18, 2015 in Ames, Iowa.

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Trump spars with Graham, other GOP candidates

Nobody seems to be off-limits for Donald Trump, who continues to trade jabs with candidates from his own political party. CNN's Joe Johns reports.

Trump spars with Graham, other GOP candidates

Nobody seems to be off-limits for Donald Trump, who continues to trade jabs with candidates from his own political party. CNN's Joe Johns reports.